Peters



. 3 Sheets Sheet I. R. S-OHLUTE-R.

' No. 275,276. Patented Apr. 8,, 1883,

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(No Model.) 3 S,heets--'Sheet 2.

R. SGHLUTBR.

GAS RETORT FURNACE.

Patented Apr.

N. PETERS PhnhrLilhographnr. WIISMIXKIOIL n. (:v

(No Model.) 3 Sheets-Sheet 3-.

R SG'HLUTER.

GAS RETO'RT FURNAGE. No.275,276. Patented Apr. 3, 1883.

' UNITED STATES PATENT OFFICE.

RUDOLPH SCHLIT'IER, OF NEIV YORK, N. Y., ASSIGNOB OF ONE-HALF TO OTTO WESSELL, OF SAME PLACE.

GAS-RETORT FURNACE.

SPECIFICATION forming part of Letters Patent No. 275,276, dated April 3, 1883.

Application filed January 11, 1883. (No model.)

To all whom it may concern:

Be it known that I, RUDULPH SoHLi'I rna, of

the city of New York, in the county and State of New York, have invented a new and useful ImprovementinGas-Retort Furnaces, of which the following is a specification.

My invention relates to what is known as the slit furnace,which forms the subject of Letters Patent No. 208,106, granted September 17,

to 1878, to George Liegel. In such a furnace the fire-chamber, into which is fed the fuel, is provided at the bottom with a long and narrow slit, and the lower portion of the walls of the fire-chamber are sloped or inclined downward to this slit. Below the slit are bearer-bars, on which the coke, slag, and ashes fall as they drop through the slit, and on said bearer-bars the coke is burned, while the slag and ashes fall into the ash pit or chamber. In the furnace referred to the front, below the slit, is entirely open, and as the air before its passage through the slit can more easily pass over the bearer-bars than below, and then upward between the bearer-bars, it follows that the coke burning on the bearer-bars does not receive a sufficient amount of oxygen to burn with the required rapidity.

One object of my invention is to remedy this defect; and to this end my invention consists in the combination, with a fire-chamber having sloping and converging walls terminating in a slit, and bearer-bars below said slit, of doors closing the front below said slit, and a plate or partition extending from the front ends of the bearer-bars to said doors. By this construction I provide for properly regulating the admission of air both above and below the bearer-bars, as may be found desirable.

The invention consists in the combination, with a furnace of the kind above described, of a novel system of flues, whereby air is heated in the walls of the furnace, and is delivered above the fuel in the fire-chamber to mingle with the gases arising from the fuel.

In the accompanying drawings,Figure 1 represents two gas-retort furnaces embodying my invention, one being shown in front elevation without the doors and the other in vertical section. Fig. 2 represents avertical section of the furnacein a direction lengthwise of the retorts. Fig. 3 represents a partial front elevation of the furnace with the doors in place. Fig. 4 represents a horizontal section on the dotted line 00 .r, Fig. 1. Fig. 5 represents a vertical section on the dotted line y 3 Fig. 1. Fig. 6 represents a horizontal section through one of the doors and its frame, and a portion of the front of the furnace upon a larger scale; and Figs. '7 and 8 represent sectional views, showing how the door-frames are secured. 6

Similar letters of reference designate corresponding parts in all the figures.

Adesignates the fire-chamber, thelower portions of the sides of which slope inward and converge step by step and terminate in a long 6;

narrow slit, a. The upper portion of the walls of the fire-chamber A converge upward, and from the fire-chamber the products of combustion pass through a passage or opening, 1), into the retort-chamber above.

B designates the retorts, of which any number, arranged in any desired manner, may be employed. The products of combustion, after circulating around the retorts, escape through flues 0 to the chimney-flue d. The benches of reto rts may be arranged back to back in a wellknown manner; and in Fig. 2 are shown the back portions of another set of retorts, B, and another chimney-flue, d. I

As shown in Fig. 2, the slit at the bottom of the fire-chamber is inclined from its front end rearward and below the slit, and arranged at a corresponding inclination are bearer-bars e, and below the bearer-barsis the ash-pitO. The coke, slag, and ashes drop through the slit a and fall upon the bearer-bars c, and upon them the coke is burned, while the ashes and slag fall into the ash-pit 0.

Heretofore the front of the furnaces of this kind, below the slit and above and below the bearer-bars, has been entirely open, and as the air could pass in over the bearer-bars more easily than upward between them the larger volume of air has been drawn in over the bearer-bars, and the coke burning upon the bars has not received a sufficient quantity of air for its proper combustion. I close the front both above andbelow the bearer-bars, and can therefore control the admission of air as may be found most advantageous.

D D designate the upper and lower doorframes, which are provided with hinged doors E E, as best shown in Figs. 2 and 3. At the upper edge of the frame D and'thelower edge of the frame D are anchors F, secured in the wall, as shown in Fig. 6, and the projecting ends of these anchors form hooks or lugsf, which are adapted to receive the door-frames I) D behind them. The upper door-frame, D, is slipped up behind the upper hooks f, and

- the lower door-frame, D, is slipped down behind the lower hooks f. The adjacent edges of the door-frames will then come together, as shown in Fig. 8. On the inner sides of the door-frames D D, at their meeting edges, are ribs 9, and hdesiguates bolts with hooked heads h, which are passed through between the meetin g edges of the door-frames, as shown in Fig. 7. The hooked heads h of the bolts h embrace the ribs 9, and when washers ]L2 are applied to the bolts and their nuts are screwed up tight the door-frames are securely held in place.

When it is desired to remove the door-fra mes all that is necessary is to take out the bolts h, and then pull out the frames 1) D, the one being drawn downward and the other upward to free them from the hooksf. The lower door, E, is provided with a damper, i, for regulating the admission of air, and the upper door, E, may be provided with a corresponding damper, and is provided with a small door, j, through which a bar may beinserted for clearing the slit to from slag.

From the outer ends of the bearer-bars e a division plate or partition, Gr, extends forward to the doors, and hence any air admitted below the bearer-bars can only pass upward between said bars. The coke on the bearer-bars therefore receives a proper quantity of air to insure its perfect combustion. The fire-chamber A is provided with a door, H, through which fuel may be introduced into it, and this door may be closed by a tight joint. Access may also be had to the fire-chamber through an opening, A, if desired, for cleaning it out or for any other purpose. In furnaces of this kind, heated air is introduced above the fuel in the fire-chamber to mingle with the gases arising from the fuel and improve combustion. The arrangement of the flues for heating and introducing the air is best shown in Figs. 1, 4, and 5, but is also shown by dotted lines in Fig. 2. On each side of the fire-chamber A are two tines, 70 k, which open through the front of the furnace, and are provided with doors, as shown in Fig. 3, for regulating the admission of air. These flucs extend backward and forward, as shown by dotted lines in Fig. 2, and deliver the heated air into a flue, l, which is divided by a partition, Z, midway of its length, as shown in Fig. 4. Extending parallel with each flue, Z, and near the wall of the passage 1), isafluemz, communicating with theflue l at the ends and divided by a partition, m. The flue m is provided with numerous perforations, m through which the heated air escapes into the passage 1) to mingle with the gases.

It will be observed that the flues 70 70 enter the fines Zclose to the central partitions, l, and the heated air passes in opposite directions and enters the tines m at both ends. This insures a uniform or nearly uniform delivery of air through the perforations m and throughout the whole length of the fines m. By this means I effect a more thorough commingling of the heated air and products of combuston.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, with a tire chamber having sloping and converging walls terminating in a slit, and bearer-bars below said slit, of doors closing the front below said slit, and a plate or partition entering from the front ends of said bearer-bars to said doors, substantially as and for the purpose herein described.

2. The combination, in a furnace, of the separate fines I; It in the side thereof, the fine 1, provided with a partition on opposite sides of which the fines k k enter, and the flue m,

provided with perforations for the escape of heated air, and communicating with the flue Z at the ends, substantially as herein described. 

